﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Count_down
{
    public partial class Form1 : Form
    {
        int count;
        int time;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            int i;
            for (i = 1; i < 100; i++)
            {
                comboBox1.Items.Add(i.ToString()+" 秒");
            }
            comboBox1.Text = "1 秒";
            this.BackColor = Color.White;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Stop();
            count = 0;
            string str = comboBox1.Text;          
            time = Convert.ToInt16(str.Substring(0,2));
            progressBar1.Maximum = time*100;
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            count++;
            label3.Text = ((time*100 - count)/100).ToString() + "秒";
            progressBar1.Value = count;
            if (count == time*100)
            {
                timer1.Stop();
                count = 0;
                System.Media.SystemSounds.Asterisk.Play();
                MessageBox.Show("时间到了","提示");
            }
        }
    }
}
